bytev-charts/lib/plugin/three.js/examples/js/shaders/MirrorShader.js

基于echarts和JavaScript及ES6封装的一个可以直接调用的图表组件库，内置主题设计，简单快捷，且支持用户自定义配置； npm 安装方式: npm install bytev-charts 若启动提示还需额外install插件,则运行 npm install @babel/runtime-corejs2 即可;

import "core-js/modules/es.array.join.js";
console.warn("THREE.MirrorShader: As part of the transition to ES6 Modules, the files in 'examples/js' were deprecated in May 2020 (r117) and will be deleted in December 2020 (r124). You can find more information about developing using ES6 Modules in https://threejs.org/docs/#manual/en/introduction/Installation.");
/**
 * Mirror Shader
 * Copies half the input to the other half
 *
 * side: side of input to mirror (0 = left, 1 = right, 2 = top, 3 = bottom)
 */

THREE.MirrorShader = {
  uniforms: {
    "tDiffuse": {
      value: null
    },
    "side": {
      value: 1
    }
  },
  vertexShader: ["varying vec2 vUv;", "void main() {", "	vUv = uv;", "	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );", "}"].join("\n"),
  fragmentShader: ["uniform sampler2D tDiffuse;", "uniform int side;", "varying vec2 vUv;", "void main() {", "	vec2 p = vUv;", "	if (side == 0){", "		if (p.x > 0.5) p.x = 1.0 - p.x;", "	}else if (side == 1){", "		if (p.x < 0.5) p.x = 1.0 - p.x;", "	}else if (side == 2){", "		if (p.y < 0.5) p.y = 1.0 - p.y;", "	}else if (side == 3){", "		if (p.y > 0.5) p.y = 1.0 - p.y;", "	} ", "	vec4 color = texture2D(tDiffuse, p);", "	gl_FragColor = color;", "}"].join("\n")
};